INDEX. 



641 



Hunter, J., on the number of spe- 

 cies of man, 170; on secondary 

 sexual characters, 203; on the 

 general behavior of female ani- 

 mals during courtship, 217; on 

 the muscles of the larynx in 

 song-birds, 366; on the curled 

 frontal hair of the bull, 526; on 

 the rejection of an ass by a fe- 

 male zebra, 535. 



, W. "W., on the recent 



rapid increase of the Santali, 

 44; on the Santali, 187. 



Huss, Dr. Max, on mammary 

 glands, 158. 



Hussey, Mr., on a partridge dis- 

 tinguishing persons, 406. 



Hutchinson, Col., example of rea- 

 soning in a retriever, 75. 



Hutton, Capt., on the male wild 

 goat falling on his horns, 503. 



Huxley, T. H., on the structural 

 agreement of man with the 

 apes, 2; on the agreement of the 

 brain in man with that of lower 

 animals, 6; on the adult age of 

 the orang, 8; on the embryonic 

 development of man, 9; on the 

 origin of man, 3, 11; on varia- 

 tion in the skulls of the natives 

 of Australia, 25; on the abductor 

 of the fifth metatarsal in apes, 

 40; on the nature of the reason- 

 ing power, 75; on the position 

 of man, 146; on the sub-orders 

 of primates, 148; on the Lemu- 

 ridse, 153; on the Dinosaurla, 

 154; on the amphibian affinities 

 of the Ichthyosaurians, 154; on 

 variability of the skull in cer- 

 tain races of man, 170; on the 

 races of man, 172; supplement 

 on the brain, 199. 



Hybrid birds, production of, 409. 



Hydrophobia communicable be- 

 tween man and the lower ani- 

 mals, 7. 



Hydroporus, dimorphism of fe- 

 males of, 273. 



Hyelaphus porcinus, 641. 



Hygrogonus, 342. 



Hyla, singing species of, 346. 



Hylobates, absence of the thumb 

 in, 49; upright progression of 

 some species of, 51; maternal af- 

 fection in a, 68; direction of the 

 hair on the arms of species of, 

 147; females of, less hairy below 

 than males, 553. 



. ■ agilis, 49; hair on the arms 



of, 147; musical voice of the, 

 522; superciliary ridge of, 553; 

 voice of, 562. 



hoolock, sexual difference of 



color in, 532. 



lar, 49; hair on the arms of. 



147. 



leuciscus, 49; song of, 562. 



syndactylus, 49; laryngeal 



sac of. 522. » 

 41 



Hylophila prasinana, 305. 



Hymenoptera, 289; large size of 

 the cerebral ganglia in, 52; class- 

 ification of, 144; sexual differ- 

 ences in the wings of, 274; acu- 

 leate, relative size of the sexes 

 of, 276. 



Hymenopteron, parasitic, with a 

 sedentary male, 217. 



Hyomoschus aquatlous, 442. 



Hyperythra, proportion of the 

 sexes in, 246. 



Hypogyrana dispar, sexual differ- 

 ence of color in, 312. 



Hypopyra, coloration of, 312. 



Ibex, male, falling on his horns, 

 603; beard of the, 526. 



Ibis, white, change of color of 

 naked skin in, during the breed- 

 ing season, 384; scarlet, young of 

 the, 475. 



tantalus, age of mature plu- 

 mage in, 478; breeding in imma- 

 ture plumage, 479. 



Ibises, decomposed feathers in, 

 380; white, 488; and black, 489. 



lohneumonidee, difference of the 

 sexes in, 289. 



Ichthyopterygia, 36. 



Ichthyosaurians, 154. 



Idiots, microcephalous, their 

 characters and habits, 34; hairi- 

 ness and animal nature of their 

 actions, 35; microcephalous, im- 

 itative faculties of, 86. 



Iguana tuberculata, 350. 



Iguanas, 360. 



Illegitimate and legitimate chil- 

 dren, proportion of the sexes in, 

 239. 



Imagination, existence of, in ani- 

 mals, 72. 



Imitation, 66; of man by mon- 

 keys, 71; tendency to, in mon- 

 keys, microcephalous idiots and 

 savages, 86; influence of, 126. 



Immature plumage of birds, 456, 

 459. 



Implacentata, 153. 



Implements, employed by mon- 

 keys, 78; fashioning of, peculiar 

 to man, 80. 



Impregnation, period of, influence 

 of, upon sex, 239. 



Improvement, progressive, man 

 alone supposed to be capable of, 

 77. 



Incisor teeth, knocked out or filed 

 by some savages, 569. 



Increase, rate of, 43; necessity of 

 checks in, 45. 



Indecency, hatred of, a modern 

 virtue, 115. 



India, difficulty of distinguishing 

 the native races of, 163; Cyprin- 

 idse of, 399; color of the beard 

 in races of men of, 553. 



